e2guardian is an Open Source web content filter, It filters the actual content of pages based on many methods including phrase matching, request header and URL filtering, etc. It does not purely filter based on a banned list of sites.
DansGuardian is an award winning Open Source web content filter which currently runs on Linux, FreeBSD, OpenBSD, NetBSD, Mac OS X, HP-UX, and Solaris. It filters the actual content of pages based on many methods including phrase matching, PICS filtering and URL filtering.Discontinued
Latest update in 2012: https://sourceforge.net/projects/dansguardian/files/
We are a team of developers, tech experts, businesspeople, mums and dads who love the world wide web but want to create safer online spaces. We hope you will join us in keeping families and individuals safe online.